\begin{tikzpicture}[>=Stealth]
    \draw [->] (-1.0,0) -- (3.5,0) node[anchor=north] {$x$};
    \draw [->] (0,-3.5) -- (0,1.5) node[anchor=east] {$y$};
    \node at (-0.3,-0.3) {$O$};
    \foreach \x in {1,2,3} {
        \draw (\x,0.2) -- (\x,0) node[anchor=north] {$\x$};
    }
    \foreach \y in {-3,-2,-1,1} {
        \draw (0.2,\y) -- (0,\y) node[anchor=east] {\y};
    }

    \coordinate (O) at (0, 0);
    \coordinate (P) at (2, -3);
    \draw(O) -- ($(O)!1.1!(P)$) node[anchor=north] {$\alpha$的终边};
    \draw [fill=black] (P) circle(1pt) node[anchor=west] {$P(x, y)$};
\end{tikzpicture}
